Show simple item record

dc.creatorBarron, Andrew R.
Defriend, Kimberly A.
dc.date.accessioned 2015-05-04T19:05:44Z
dc.date.available 2015-05-04T19:05:44Z
dc.date.issued 2007-05-22
dc.identifier.urihttps://hdl.handle.net/1911/79940
dc.description.abstract A method for making hollow spheres of alumina or aluminate comprises: coating polymeric beads with an aqueous solution of an alumoxane, drying the beads so as to form an alumoxane coating on the beads; heating the beads to a first temperature that is sufficient to convert the alumoxane coating to an amorphous alumina or aluminate coating and is not sufficient to decompose the polymeric beads; dissolving the polymeric bead in a solvent; removing the dissolved polymer from the amorphous alumina or aluminate coating; and heating the amorphous alumina or aluminate coating to a second temperature that is sufficient to form a hollow ceramic sphere of desired porosity and strength. The hollow spheres can be used as proppants or can be incorporated in porous membranes.
dc.format.extent 22 pp
dc.language.iso eng
dc.title Production method of high strength polycrystalline ceramic spheres
dc.type Utility patent
dc.digitization.specificationsThis patent information was downloaded from the US Patent and Trademark website (http://www.uspto.gov/) as image-PDFs. The PDFs were OCRed for access purposes.
dc.contributor.publisher United States Patent and Trademark Office
dc.type.genre patents
dc.type.dcmi Text
dc.date.filed 2004-02-06
dc.identifier.patentID US7220454B2
dc.contributor.assignee Rice University
dc.identifier.citation Barron, Andrew R. and Defriend, Kimberly A., "Production method of high strength polycrystalline ceramic spheres." Patent US7220454B2. issued 2007-05-22. Retrieved from https://hdl.handle.net/1911/79940.


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record